65888881 has 2 divisors, whose sum is σ = 65888882. Its totient is φ = 65888880.

The previous prime is 65888873. The next prime is 65888983. The reversal of 65888881 is 18888856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 1648656 = 8015^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 65888881 - 2³ = 65888873 is a prime.

It is a super-2 number, since 2×65888881² = 8682689278864322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65888861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944440 + 32944441.

It is an arithmetic number, because the mean of its divisors is an integer number (32944441).

Almost surely, 2^65888881 is an apocalyptic number.

It is an amenable number.

65888881 is a deficient number, since it is larger than the sum of its proper divisors (1).

65888881 is an equidigital number, since it uses as much as digits as its factorization.

65888881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 983040, while the sum is 52.

The square root of 65888881 is about 8117.1966219872. The cubic root of 65888881 is about 403.8970774154.

The spelling of 65888881 in words is "sixty-five million, eight hundred eighty-eight thousand, eight hundred eighty-one".